---
agentTools:
  projectIndex: https://docs.moderntreasury.com/platform/llms.txt
---

# 5.18.2026

# Upcoming Changes

### :books: Ledgers

*(Releasing June 1, 2026)* **1-Year Backdating Limit on Ledger Transactions**

Ledger Transaction Create and Update requests with `effective_at` 1 year before the time of the request will be rejected with HTTP 422 errors. Please reach out to your customer representative if you have any questions or concerns.

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